Store repaint rects in the coordinate space of their backing GraphicsLayer.

Source/core/rendering/RenderFrameSet.cpp

 /**
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Simon Hausmann <hausmann@kde.org>
  *           (C) 2000 Stefan Schimanski (1Stein@gmx.de)
  * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 426 matching lines @@
 
 void RenderFrameSet::layout()
 {
     ASSERT(needsLayout());
 
     bool doFullRepaint = selfNeedsLayout() && checkForRepaintDuringLayout();
     LayoutRect oldBounds;
     const RenderLayerModelObject* repaintContainer = 0;
     if (doFullRepaint) {
         repaintContainer = containerForRepaint();
-        oldBounds = clippedOverflowRectForRepaint(repaintContainer);
+        oldBounds = boundsRectForRepaint(repaintContainer);
     }
 
     if (!parent()->isFrameSet() && !document().printing()) {
         setWidth(view()->viewWidth());
         setHeight(view()->viewHeight());
     }
 
     unsigned cols = frameSet()->totalCols();
     unsigned rows = frameSet()->totalRows();
 
     if (m_rows.m_sizes.size() != rows || m_cols.m_sizes.size() != cols) {
         m_rows.resize(rows);
         m_cols.resize(cols);
     }
 
     LayoutUnit borderThickness = frameSet()->border();
     layOutAxis(m_rows, frameSet()->rowLengths(), height() - (rows - 1) * borderThickness);
     layOutAxis(m_cols, frameSet()->colLengths(), width() - (cols - 1) * borderThickness);
 
     positionFrames();
 
     RenderBox::layout();
 
     computeEdgeInfo();
 
     updateLayerTransform();
 
     if (doFullRepaint) {
         repaintUsingContainer(repaintContainer, pixelSnappedIntRect(oldBounds), InvalidationSelfLayout);
-        LayoutRect newBounds = clippedOverflowRectForRepaint(repaintContainer);
+        LayoutRect newBounds = boundsRectForRepaint(repaintContainer);
         if (newBounds != oldBounds)
             repaintUsingContainer(repaintContainer, pixelSnappedIntRect(newBounds), InvalidationSelfLayout);
     }
 
     clearNeedsLayout();
 }
 
 static void clearNeedsLayoutOnHiddenFrames(RenderBox* frame)
 {
     for (; frame; frame = frame->nextSiblingBox()) {
@@ skipping 173 matching lines @@
         return SetCursor;
     }
     if (canResizeColumn(roundedPoint)) {
         cursor = columnResizeCursor();
         return SetCursor;
     }
     return RenderBox::getCursor(point, cursor);
 }
 
 } // namespace WebCore